If you see an animal with curly red hair, the curly red hair is ?

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?